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Light-emitting diode - Wikipedia In electrical engineering, a light-emitting diode (LED) is a semiconductor device that emits light when current flows through it Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons
Light Emitting Diode (LED): What is it How Does it Work? What is a Light Emitting Diode (LED)? A Light Emitting Diode (LED) is a special type of PN junction diode The light emitting diode is specially doped and made of a special type of semiconductor This diode can emit light when it is in the forward biased state
LED | Definition, Light, Facts | Britannica An LED (light-emitting diode) is a semiconductor device that emits infrared or visible light when charged with an electric current
LED (Light-emitting diode) explained - Soldered Electronics The first question that might pop into your mind is, what is exactly an LED? A regular diode is a semiconductor device that works as a one-way switch for electrical current It allows current in only one direction and will stop it from flowing in the other An LED works the same way
Light Emitting Diode (LED): Principle, Advantages, and Uses A light-emitting diode (LED) is a small electronic device that emits light when an electric current flows through it LED works by passing electricity through a semiconductor, which releases energy in the form of light
Learn About LED Lighting - ENERGY STAR LED stands for light emitting diode LED lighting products produce light up to 90% more efficiently than incandescent light bulbs How do they work? An electrical current passes through a microchip, which illuminates the tiny light sources we call LEDs and the result is visible light
What is LED ( Light Emitting Diodes ) | LED Lighting Supply LED dates back to the early 1900s when a British physicist discovered silicon carbide crystals could produce light when electric currents were touched In 1962, GE scientist Nick Holonyak developed the first visible light LED diode
What is an LED? | All About LEDs | Adafruit Learning System In fact, the first two letters of LED stand for Light Emitting A really nice thing about LEDs is that they are very simple Unlike some chips that have dozens of pins with names and special uses, LEDs have only two wires One wire is the anode (positive) and another is the cathode (negative)
What is LED Lighting: Definition, Working Principle and Components LED lighting refers to the use of a light emitting diode as a source of illumination Unlike traditional incandescent bulbs or fluorescent lamps, an LED is a semiconductor device that emits light when electrical current passes through it in the forward direction